Pneumatic cleaner



March 1, 1932. E. NIELSEN 1,847,696

PNEUMATIC CLEANER I Filed June 25. 1930 Patented Mar. 1, 1932 UNI-TED STATE s EMANUEL mnnsmv, or moms, ,WISCONSIN, Assmn on To amnion mum mumcruimve COMPANY, ornacmn, WISCONSIN; A conromaron or wxsoonsnr 1 omcE ummptmm ,7

A Applicationifiled June 23,

The invention relates to pneumatic cleaners and more particularly to devices for coupling a'hose provided with a suction tool to the suction nozzle which is fixed to the'fan 'zle' of the cleaner; in which the use of packing between the nozzle and the coupling is unnecessary; which can be produced at a low cost and mainly from metal tubing; in Which the air inlet connection consists of a longitudinal extension on the tube; and which is light in weight, so that it is'ada'pted' for use onhand manipulated cleaners. Other objects of the invention and the various advantages and characteristics of the present coupling W'illbe apparent from a consideration of the following detailed description,

The invention consists in the several novel features hereinafter set forth and more par-"- ticularly defined by claims at the conclusion hereof.

In the drawings which accompany and form a part of this specification or disclosure and in which like numerals of reference de-" note corresponding parts throughout the several views: Fig. 1 is a perspective of a pneumatic cleaner, with a suction tool connected thereto by a coupling embodying the; invention. Fig. 2 is a perspective of the coupling. Fig. 3 is a central transverse section through the coupling tube and the clean-. er nozzle. Fig. 4 is an end view. Fig. 5 is a longitudinal section through the coupling and nozzle. I

The invention is exemplified with a pneu-, matic cleaner which comprises a casing containing a suction fan; a casing 11 con-- taining an electric motor for driving the fan a forwardly and downwardly extending suc-' tion tube 12 terminating at its front and low er end in an elongated suction nozzle 13. which is provided at its lower margin with longitudinal grooves 1 9 to form flanges or beads 14 in the front and back walls of, the nozzle; a handle 15 which is secured to the fan and motor casings and is adapted to be:

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used in order' to'manipula'te the cleaner'from place to place, and a discharge duct 16 which is connected to the periphery of the fan easing and operates to discharge dust into a; collector bag 17. A brush is secured to the rear wall of the nozzle to loosen the dust in the fabric being cleaned when the nozzle is used without the attachment hereinafter described.

In use, it is frequently desired to connect a suction tool 18 to the cleaner in orderthat the cleaner may be used to clean places which are not. accessible to the suction nozzle 13. The tool 18 is connected to one end of a flexible hose '19. The other end of the hose is connected to the improved coupling. This I coupling consists of a tube 20 which is adapted to extend longitudinally of the nozzle 13, and is provided with a tapered continuation .or extension 21 over which one end of the hose 19 isslipp ed. This extension constitutes an air inlet connection for the coupling tube QOdisposed at one end thereof, so that the conjnectionfmay be integrally formed with the tubeQO'which forms the body of the coupling; The elasticity of the hose causes it to grip frictionally' the extension to form a; tight j i t The tube20 has cut therein a longitudinally extending slot 22 of sufficient length to permitthe tube to receive the nozzle, so that the duct in the tube will bein communication with the chamber in the nozzle throughout the length of said duct. The tube is reversible so it may be slipped 0ntothe nozzle from either end to accommodateright or left handed users. The slot 22 is of a width corresponding to the width of the nozzle 13, across the bases of rooves 14 and'of a length corresponding to t e length of the nozzle, so thatthe margins of the Wall of the tube around'theslot willreceive andfit over beads 14; and into said grooves and form a tight interlocking joint between the nozzle and the tube. The tube is formed of a single piece of sheet metal tubing, so that the margins of the slot will besufii'cientl resilient togrip the nozzle with sufficient rmness to make a tight jointf The end of the tube 20 opposite the air-inlet connection 21 has se 1 sure and the tube to receive the flange 14 on cured therein a cup-shaped closure which comprises a wall 23 and'a flange 24 fitting the inner periphery of the tube and fixedly secured therein by welding. The closure is recessed, as at 25, so that the end of the tube will be open immediately beneath the, slot 22 to permit the nozzle to pass into and out of the slot. This recess is formed by indenting the flange 24 of the closure to form a substantially straight wall 26 which fits against the'nozzle13 and alsoleaves the tube wall at the margins of the slot sufficiently free so t they will be 20.

slightly resilient to grip the nozzle. p

. When the coupling tube is removed from the nozzle 13, the cleaner may be operated without the attachment.

To connect the attachment to the nozzle, it is only necessary to slip the tube 20 longitudinally onto the nozzle. To disconnect the nozzle, it is merely 3 necessary to slide the tube 2-0 longitudinally oi the nozzle.

The invention exemplifies a detachable coupling for a pneumatic cleaner provided with 1 elongated suction nozzle, which is formed ,mainly of a metal tube; which has integral portions which will grip the nozzle; which has a closure at one endthereof for engaging the outer faceof the nozzle adjacent the i open end of the nozzle-receiving slot; which canbe manufactured from a single piece of tubing with a longitudinal extension formsing. the air inlet for the hose; in whlch the wall of the tube around the slot is sufficiently resilient to form a tight joint between the tube 'and the nozzle; and which is light in weight,

so that it can be advantageously used in connection with hand cleaners.

.7 The invention is not to be understood as restricted to the details set forth, since these i may be modified within the scope of the appended claims, without departing from the spirit and scope of the invention. T Havingthus described theinvention, what- I claim as new and desire to secure by Letters Patent, is:

1. Aicoupling for detachably connecting a hose'to a pneumatic cleaner'having an elongated suction nozzle, comprising a one-plece L -tube of sheet metal having a longitudinal islet extending through one end thereof whereby it may be slid into connected rela- 'tion with the inlet end of the suction nozzle,

. a closure piece extending across and secured to the said one end of the tube and provided with a recess at one edge registering with the slot to permit of entry of the inlet end of the nozzle into said slot, and means associated with the other end of the tube forming an inlet connection for receiving the hose.

2. A coupling for detachably connecting a hose to a pneumatic cleaner having an elongated suction nozzle, comprising a onepiece, cylindrically shaped tube of sheet metal having a longitudinal slot extending through one end thereof whereby it may be slid into connected relation with the inlet end of the suction nozzle, a circular closure piece extending across and secured to thesaid one end of the tube and having the portion thereof that is adjacent to the slot deflected so as to permit of entry of the inlet end of the wall into said slot, and means associated with the other end of the tube forming an inletconnection for receiving the hose.

3. A coupling for detachably connecting a. hose to a pneumatic cleaner having an elongated suction nozzle, comprising a one-piece tube of sheet metal having a longitudinal slot extending through one end thereof whereby it may be slid into connected relation with the inlet end of the suction nozzle, a closure piece extending across and secured to the said one end of the tube and provided with a recess at one edge registering with the slot to permit of entry of the inlet end of the nozzle into said slot, and a tapered inlet connection formed integrally andin alignment with the.

other end of the tube for receiving therearound one end of the hose.

Signed at Racine, Wisconsin, this 2 day of June, 1930.

EMANUEL NIELSEN.

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